Grade 8 Science Unit 4: “Cells, Tissues, Organs & Organ Systems” Chapter 12: The health of the body depends on the health of its interdependent systems.
How Body Systems are Connected All the cells of the body have the same basic needs. Energy Nutrients Oxygen
Removal of wastes Body systems work together to provide cells with what they need.
Example: Cellular Respiration A chemical process that releases energy that is stored in glucose.
Glucose Oxygen Energy Carbon dioxide Water vapour Cellular Respiration
Organ systems that are directly involved with cellular respiration include: Respiratory system Digestive system Circulatory system Excretory system
More Connections Between Systems include... Circulatory & Respiratory Circulatory & Digestive Nervous & Muscular
2. Chart - Circulatory & Respiratory Blood picks up oxygen from the lungs and brings to all cells of body. Blood get dirty CO2 and goes to lungs/exhaled.
Circulatory & Digestive Digestive system breaks down food into glucose/nutrients. Nutrients go to blood from small intestine. Blood carries nutrients to body cells.
Nervous & Muscular Keep your body temperature stable. Nervous system monitors environment conditions, through temperature-sensing cells in the skin.
Brain picks up signals from nerves and sends new signals to parts of the body that are affected (muscles). Ex. If cold, the muscles will shiver.
Body Systems & Health Maintaining the health of each body system keeps the network of systems, and the whole body healthy.
3. Factors that affect the health of the body systems include: 1.Diet 2.Exercise 3.Stress
The Balance of Body Systems Can be affected by both: Genetic factors Lifestyle factors
4. A)Genetic Factors Things you inherit from one or both birth parents. Out of your control
4.B)Lifestyle Factors page 449 Within your control Include: Diet Smoking Drugs and alcohol Lack of exercise
To support healthy organs and body systems, we all have the same basic needs. Clean air and water A nutritious and well-balanced diet Exercise Restful sleep
Scientific Technologies 5. Insulin pump: a device that can be programmed to deliver a specific dose of insulin at specific times during the day. Worn at all times. (Diabetes)
Insulin pump
5. Artificial Heart: used when a donor heart is unavailable. It is difficult for humans to stay alive for any length of time using hearts from other species.
Artificial Hearts
“Artificial Organs”
“The Effect of Activity on Heart Rate and Breathing Rate”
6. Examples of Careers in Health Lab technician X-ray technician Physiotherapist Nutritionist Coaches Doctor
Public health nurse